Smoke-stack.



PATENTED DEG. 11,'1906.

c. vSTIELLR. SMOKE STACK. APPLICATION FILED 00T.16. 1905.

i .h lzwVY TH: NaRRls PETERS co4, WASHINGTON, u. c.

CARL STIELER, CF CHICAGO, ILLINOIS.

SMOKE-STACK.

Specification of Letters` Patent.

Patented' Dec. 1,1, 1906.

Application filed October 16. 1905. Serial No. 282,898.

To @l zul/1,0711, t T11/(Ly concern:

Be it known that I, CARL STIELER., a subject of the German Emperor, anda` resident of Chicago, in the county of Cook and State 'of Illinois,have invented certain new and useful Improvements in SmokeeStacks andSimilar Structures, of whichthe following is a specification.

This invention relates to structures or inclosures having double wallsand an intervening air-space; andthe generalI object of the invention isto make provision for unequal expansion and contractionand at the sametime provide a connecting-wall or`connecting-wallscompletely bridgingthe space between the walls and closing the end'or ends of said space.

The particular obect ofA my invention is to provide improvements forsmoke-stacks of the concrete-construction type, wherein the lower parthas double walls or a hollow wall to provide a circumferential air-spaceopen to the outer air. In such construction the inner wall protects theouter wall or smokestack proper against the superheated gases ofcombustion. As a result the inner wall is more rapidly expanded orcontracted than the outer wall and is usually constructed so that it isfree of the outer wall to permit the expanding movement, whichleaves anopening from the air-space'leading vinto the flue, through which openingthe current of air from the air-space issues and intercepts the draft ofhot gases. My invention has for its design the complete closure orsubstantial closure of this opening, and to that end consists of anouter and an inner wall constructed so that the upper end of the innerwall is loosely supported by the outer wall and in such a manner thatthe air-space between the walls is closed to the chimney-fine;

The invention fur-ther consists in a flexible wall, diaphragm, orpartition between the outer and inner wall and in the novel details ofconstruction and combinations of parts hereinafter described in detail,illustrated in the drawings, and incorporated in the claims.

In the drawings, Figure 1 is an elevation, partly broken away verticallyand horizontally, of a smoke-stack embodying my invention. Fig. 2 is anenlarged horizontal section, taken on substantially line X X of Fig. l.

Fig. 3 is a similar section taken on line Y Y of Fig. l. Fig. 4 is anenlarged plan view of the flexible wall, partition, or diaphragm. Fig. 5is a section taken substantially on line Z Z of Fig. 4. Fig. 6 is anenlarged fragment broken away between substantially lines Y Y and X X ofFig. l.

Referring to the drawings in detail, 2 represents a smoke-stack,the'lower section of whichcomprises anouter wall 3 and-an inner wall 4,separated to leave anair-space 5 open to the outer air through holes 6and 7 at the top and bottom, respectively, vof the .air space 5. Inorder to allow the inner walll 4 to expand and contract relatively tothe outer wall 3 and at the same time substan v tially close theair-space to the regular draft-passage 8 in the flue, I preferably alinethe inner wallwith the upper portion of the stack and offset outwardlythe outer wall,

whereby a ledge 9 is formed. The inner wall 4 is preferably arranged toform substantially a continuation of the wall 4, forming the up perportion of the stack and an integral par-t of the outer wall 3.

The upper endv of the Wall 4 is preferably arranged to overlap the ledgeor offset 9, so as to cause the latter to give lateral support to theupper end of the inner walland` maintain the walls 4 and 4 inparallelism. Any suitable means that will give such support may beemployed. a loose tongue-and-groove joint formed by a mortisc or groovei() in the ledge 9 the upper end of the wall 4 having a reduced portionor tongue 11, formed by cutting a rabbet l2 in the top and inner surfaceof wall 4. By this arrangement the inner surface 13 of the wall 4 isalined with the corresponding surface 14 Of the wall 4.

I close the air-space 5 to the flue 8 by means of a flexible annularwall, partitionl diaphragm, or web l5. (Shown on large scales in Figs. 2and 4.) This ring, diaphragm, or wall is formed with a series of annularcorrugations or transverse bends 16, 1.7, 1S, and 19 and has outer-edgeears 20, provided'with flanges 21 22, the former being turned downwardlyand the latter upwardly in alternate order. These ears-and flanges areembedded in the wall 3. Similar ears 23, provided with upturned flanges24 and downwardly-turned flanges 25, engage the inner wall 4 in likemanner. The corrugations make the ringwall l5 flexible in two planes atright angles to each other. In other words, the width of the ring may beexpanded or contracted to permit movement ofthe walls 3 and 4 towardeach other, or it may be flexed in a circle to permit the inner wall tomove longitudinally In the drawings is shown IOO IIO

relative to the outer wall under the expanding or contracting action ofheat or cold. As the inner wall receives the intense heat to which thelower end of the smoke-stack is exposed and said wall is movableindependently of the body of the smoke-stack the latter is effectivelyprotected against the disintegrating influences of violent expansion andcontraction, and the diaphragm or ring prevents the cooling-draft in theair-space 5 from interfering` with the draft in the flue. 23 representsa series of the usual steel or iron rods embedded in the concrete forthe purpose of stii'lening or supporting the latter.

What I claim as new, and desire to secure by Letters Patent, is-

l. A smoke-stack having its lower section composed ofl separated andindependentlymovable walls arranged to form an air-space therebetweenand constructed so that said air-space is open to the atmosphere andclosed to the chimney-flue. l

2. A smoke-stack composed of double walls forming an interposedcircumferential lair-space open to the atmosphere at its upper and lowerend, the upper end of one of said walls being arranged to moverelatively to and to receive lateral support from the other of saidwalls, and means for closing said airspace to the gases of combustion.

3. A smoke-stack having its lower section composed of double wallsforming an interposed circumferential air-space, and means forconnecting the upper ends of said walls so as to close the upper end ofsaid air-space to the smoke-stack flue and yet permit said walls toexpand and contract independently of each other.

4. A smoke-stack having its lower section provided with an inner wallseparated from the walls of the smoke-stack so as to provide acircumferential air-space open to the atmosphere, and a closure betweensaid inner wall and smoke-stack which. closes said airspace to thepassage for the gases of combustion and at the same time permits saidinner wall to expand and contract independently of the walls of saidsmoke-stack. Y

5. A smoke-stack having its lower section composed of double wallsarranged to form an interposed circumferential air-space open to theatmosphere and its upper section composed of a single wall having aledge at the junction of said sections, the top of said. inner wallarranged to receive lateral support at said ledge, anda fiexiblediaphragm arranged to close said air-space to the passage for the gasesof combustion.

6. A smoke-stack having its lower section composed of an inner and anouter wall separated to form an intervening air-space, said outer wallbeing open to said air-space so as to permit circulation of air throughsaid airspace, and a closure between `the top of the inner wall and saidouter wall which 'permits the former to expand and contract relativelyto the latter and also closes said air-space to the smoke-stack iiue.

7. A smoke-stack having an outer and an inner wall arranged to'form acircumferential air-space open near its upper and lower end to theatmosphere, and an annular partitionwall arranged to connect said outerand inner wall and close said air-space to the flue, said partitionbeing constructed so as to permit said outer and inner wall to expand orcontract either in parallel planes or in the same plane.

8. A smoke-stack, having an outer and an inner wall, arranged andconstructed to form a circumferential air-space having openings throughsaid outer wall leading to the atmosphere, and a diaphragm, orconnecting-wall, spanning said air-space above said openings, saiddiaphragm or wall being resilient so as to adjust itself to expanding orcontracting movements of said outer and inner walls relatively to eachother.

9. A smoke-stack having its lower section composed of double wallsconstructed and arranged so that they form an interposed circumferentialair-space open to the atmosphere and its upper section composed of asin- V gle wall, and a corrugated diaphragm, or connecting-wall 15, ofannular form, said diaphragm or connecting-wall having its outer circleembedded in the outer of said walls and the inner circle embedded in theinner of said walls, said diaphragm or wall arranged to close saidair-space to the flue in said smokestack.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

CARL STIELER. Witnesses:

MARTIN STIELER, J. T. FIsKE.

